Portable cooler



FIG. 1 is a perspective view of a portable cooler showing my new design;

FIG. 2 is a front perspective view thereof;

FIG. 3 is a rear elevational view drawn to a larger scale than that in FIGS. 1 and 2;

FIG. 4 is a top plan view thereof;

FIG. 5 is a front elevational view thereof;

FIG. 6 is a side elevational view, the side not shown being a mirror image of the side shown.

FIG. 7 is a bottom plan view thereof;

FIG. 8 is a perspective view thereof in an open position.

FIG. 9 is a top plan view thereof in an open position. 

The ornamental design for a portable cooler, as shown and described. 